Oxygen (O), element 8 – Learn Acer periodic table

Oxygen is a chemical element with symbol O and atomic number 8. It is a member of the chalcogen group on the periodic table and is a highly reactive nonmetal and oxidizing agent that readily forms compounds (notably oxides) with most elements. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium.

Symbol O. Atomic mass 15.999 u. Group 16, period 2. Electron configuration [He] 2s2 2p4. Electrons per shell 2, 6. State at room temperature: Gas. Melting point -218.8 °C, boiling point -183.0 °C. Discovered by Carl Wilhelm Scheele.

Element data from Wikipedia, CC BY-SA 3.0.

Oxygen (O), element 8 – Learn Acer periodic table

Oxygen

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